PROJECT TITLE :

Impacts of Wall–Target Interaction on Matched Illumination Waveforms for TWRI

ABSTRACT:

The impacts of wall–target interaction on matched illumination waveforms for through-the-wall radar imaging are examined via finite-difference time-domain simulation. Returns from numerous wall–target eventualities are considered as a function of the target-to-wall separation in order to examine the effectiveness of the thus-called primary-wave target response within the matched illumination implementation. The first-wave target response is shown to effectively maximize the signal-to-interference-and-noise ratio (SINR) in through-wall radar applications where the wall–target interaction is minor, and the primary-wave response closely resembles the complete-wave target response, that contains all wall–target interactions. The ability of the primary-wave target response to maximize the SINR will be degraded by relatively minor errors within the wall–target transfer operate caused by the incomplete wall–target physics inherent to the scheme. In such cases, the resulting matched illumination waveform spectrum is generally characterised by narrowband energy targeted at suboptimal frequencies.